ECAT Pre General Science Online Test With Answers

image
image
image

ECAT Pre General Science Online Test

Sr. # Questions Answers Choice
1 The charge carriers in electrolyte are positive and negative protons electrons ions none of these
2 The relation between charge 'Q' and current 'I' is given by Q = I/t Q = It Q = I<sup>2</sup>t Q = I<sup>2</sup>/t
3 Which of the following represents an electric current? C<sup>-1</sup> CS<sup>-1</sup> J.S<sup>-1</sup> dynes<sup>-1</sup>
4 The SI unit of current is watt coulomb volt ampere
5 One coulomb per second is equal to One volt One ampere One hom One henry
6 The charge per unit time through any cross-section of a conductor is called capacitance electric power current potential difference
7 Free electrons are tightly bound fixed loosely bound tightly fixed
8 The current through a metallic conductor is due to the motion of protons neutrons electrons free electrons
9 In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called Time constant Decay constant None of these All of above
10 Capacitance of two or more capacitors Increases in series combination Increases in parallel combination Remains unchanged None of the above
11 The electric intensity at infinite distance from the point charge will be Infinite Positive Zero Negative
12 The electric intensity outside the two oppositely charged parallel metal plates is Maximum Minimum Zero Infinite
13 The energy stored in a charge capacitor 1/2CV<sup>2</sup> 1/2C<sup>2</sup>V 1/2C/V<sup>2</sup> None of these
14 In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes Four-fold One-half One-fourth Zero
15 The capacitance of a parallel plate capacitor depends upon Area of the plates Separation between the plates Medium between the plates All of the above
16 Surface density of charge is defined as Charge per unit volume Charge per unit length Charge per unit area Charge per unit mass
17 The SI unit of capacitance is Farad Henry Ohm Volt
18 Electron volt is the unit of. Potential difference Energy Resistance Capacitance
19 The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is Q=V/C Q=C/V Q=1/2CV Q=CV
20 Electron volt is the unit of Potential difference Energy Resistance Capacitance
21 If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy Ve V/e e/V 2Ve
22 One joule is equal to 1.6 x 10<sup>19</sup>eV 6.25 x 10<sup>18</sup>eV 1.6 x 18<sup>18</sup>eV 6.25 x 10<sup>19</sup>eV
23 One electron volt is equal to 1.6 x 1019eV 6.25 x 1018 eV 1.6 x 1018 eV 6.25 x 1019eV
24 When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to One joule One erg One electron volt None of these
25 The earth's potential is taken as Negative Positive Zero Infinite
26 The electric lines of force are Imaginary Physically existing everywhere Physically existing near the charge All of the above
27 Which one of the following is the unit of electric field intensity JC<sup>-1</sup> Vm<sup>-1</sup> Cm<sup>-1</sup> CJ<sup>-1</sup>
28 A closed surface contains two equal and opposite charges. The net electric flux from the surface will be Negative Positive Infinite Zero
29 The electric flux from a closed surface Is independent of the shape of the surface Depends on the charge enclosed by the surface Both a and b None of the above
30 The electric flux is linked with a surface will be maximum when The surface is held parallel to the electric field The surface is held perpendicular to the electric field The surface makes an angle of 45<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">° with the electric field</span> All of the above
Download This Set
×